to the california science center. that caused quite a stir. science center says, look, we will in fact replant two trees for every tree that was cut down. so that at least settled things down a bit. but the folks at the science center, wolf, also told us that tomorrow particularly there are some places along the route even with all the work that they have done that there will be a clearance of no more than two to three inches on either side of the space shuttle's 78-foot wingspan. so they've got to do some real, real delicate maneuvering. and they will take those spots even more slowly than the 2 miles an hour they're going now on to the next location. wolf, you know, later tonight they're actually going to be crossing the 405. and they're going to be transferring from the tow system they're using now to a pickup truck because that's lighter. and that will tow them across the 405 bridge. wolf. >> john zarrella on the scene for us in los angeles. john, thanks very much. >>> and you're in "the situation room." happening now, both campaigns are s